feat: 플레이어 경직/다운 회복 구간 추가

- HitReactionController에 경직, 다운 회복 가능 구간, Hit 속도 배율 파라미터 처리를 추가

- DownBegin/Recover 상태 종료를 StateMachineBehaviour로 받아 구르기 허용 구간과 다운 해제를 분리

- 드로그 발구르기를 경직 이펙트로 전환하고 넉백/경직 이펙트에서 Hit 애니메이션 속도 배율을 설정 가능하게 정리

- PlayMode 테스트를 추가해 경직/넉백이 Hit 애니메이션 속도 배율을 실제로 반영하는지 자동 검증

Assets/_Game/Data/Skills/Data_Skill_Drog_발구르기.asset

@@ -37,7 +37,7 @@ MonoBehaviour:
   maxGemSlotCount: 0
   castStartEffects:
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-  - {fileID: 11400000, guid: 3952a1b7ae34d1ee5b0b4bfc9faad041, type: 2}
+  - {fileID: 11400000, guid: 86d49ab180b62b395a64b1ba88045d97, type: 2}
   triggeredEffects: []
   isChanneling: 0
   channelDuration: 3

Assets/_Game/Data/Skills/Effects/Data_SkillEffect_Drog_도약_착지_1_넉백.asset

@@ -27,3 +27,5 @@ MonoBehaviour:
   force: 8
   upwardForce: 2
   duration: 0.25
+  playHitAnimation: 1
+  hitAnimationSpeedMultiplier: 1

Assets/_Game/Data/Skills/Effects/Data_SkillEffect_Drog_발구르기_1_경직.asset

@@ -0,0 +1,29 @@
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+  m_EditorHideFlags: 0
+  m_Script: {fileID: 11500000, guid: 675a8e51dce8ee00db904424ae5c8d9d, type: 3}
+  m_Name: "Data_SkillEffect_Drog_\uBC1C\uAD6C\uB974\uAE30_1_\uACBD\uC9C1"
+  m_EditorClassIdentifier: Colosseum.Game::Colosseum.Skills.Effects.StaggerEffect
+  targetType: 1
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+  areaShape: 0
+  targetLayers:
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+  areaRadius: 4.75
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+  fanRadius: 4.75
+  fanHalfAngle: 180
+  duration: 0.35
+  playHitAnimation: 1
+  hitAnimationSpeedMultiplier: 1

Assets/_Game/Data/Skills/Effects/Data_SkillEffect_Drog_발구르기_1_경직.asset.meta

@@ -0,0 +1,8 @@
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Assets/_Game/Data/Skills/Effects/Data_SkillEffect_Drog_밟기_1_넉백.asset

@@ -27,3 +27,5 @@ MonoBehaviour:
   force: 5
   upwardForce: 1
   duration: 0.18
+  playHitAnimation: 1
+  hitAnimationSpeedMultiplier: 1